Context: The Death Guard have invaded Nocturne to try and grab Vulkan's body. By this point most of them have died, and their leader tries to kill Numeon in a duel

It left Numeon alone to face the Death Guard warlord.

As he met him across the corpse-strewn, wreckage-choked terrain, the Barbaran called out.

‘Are you the prophet, the one I chased across the storm?’

He was bleeding from a dozen rents in his armour, and snarled with rad-scarred lips, his war-helm long gone. His retainers were almost finished, dispatched by Rhy’tan’s Firedrakes as the Lord Chaplain himself took apart the last Dreadnought.

‘To you, I am the ender of all things,’ said Numeon.

Draukoros had bitten deep of the Death Guard, and though he was weary, the Pyre captain knew this was the one he had to kill.

The Death Guard scoffed, as if he could reverse fate. His blade was slick with the blood of Numeon’s brothers. Numeon would ensure this foetid wretch would anoint it no further.

‘You should not have come here. It was an error. You lost your claim on my life when you let us slip through your dirty fingers, traitor. Look around you,’ he invited.

There were but he and Numeon on this part of the field. Scores of bodies surrounded them, mostly clad in begrimed white. Numeon glanced at the Firedrakes about to encroach, warning them off. This was his enemy to kill.

The Barbaran appeared unfazed by his sudden shift in fortune.

He actually laughed, then formed an ugly grin through decayed teeth.

‘Know my name, drake,’ he said, as if about to claim conquest for Barbarus, ‘he who has set foot upon your soil. Who has brought death to Nocturne. Who will claim the head of your lord and father. Remember it. I am Malig Laes–’

Draukoros thrust into the traitor’s neck, silencing anything further.

As Numeon wrenched the sword free, the Death Guard dropped his blade, a chipped but sharp kukra, and tried to staunch the bleeding.

Numeon cut off his head.

It's funny how many times in lore someone starts to proclaim their greatness before getting absolutely destroyed, and it's even better that he doesn't get to finish his speech.